The federal grand jury returned a 30-count indictment against Tsarnaev, NBC News said.

Tsarnaev, 19, was accused of setting off two bombs near the finish line of the marathon April 15 with the help of his brother Tamerlan, who was killed in an exchange of gunfire with police. The brothers were from the Caucasus region in Russia.

Three people died in the blasts. Investigators said they believe the brothers killed a university police officer in the days after the attack as they tried to evade capture.

Dzhokhar Tsarnaev was captured after a massive manhunt in the Boston area after Tamerlan Tsarnaev was killed in a shootout with police.

United Press International is a leading provider of news, photos and information to millions of readers around the globe via UPI.com and its licensing services.

With a history of reliable reporting dating back to 1907, today's UPI is a credible source for the most important stories of the day, continually updated - a one-stop site for U.S. and world news, as well as entertainment, trends, science, health and stunning photography. UPI also provides insightful reports on key topics of geopolitical importance, including energy and security.

A Spanish version of the site reaches millions of readers in Latin America and beyond.

UPI was founded in 1907 by E.W. Scripps as the United Press (UP). It became known as UPI after a merger with the International News Service in 1958, which was founded in 1909 by William Randolph Hearst. Today, UPI is owned by News World Communications.